41results about How to "Wide frequency range" patented technology

The present invention relates to the field of wireless communication technology, and proposes a communication circuit, method, device and system. The communication circuit includes a modulation element, an energy convergence network and a second resonant network. The modulation element disperses the energy of a first microwave signal of a first frequency at a first port and transmits it to the energy network from a second port. The energy convergence network converges the dispersed energy to obtain a second microwave signal. The second resonant network performs secondary frequency selection on the second microwave signal to generate an oscillation signal of a second resonant frequency. The oscillation signal is transmitted to the modulation element through a third port to mix with the first microwave signal to obtain a frequency-converted signal of a second frequency. The present invention sets up several signal transmission paths from the energy convergence network to the second resonant network without passing through the modulation element, which can reduce the loss of the second microwave signal, obtain a frequency-converted signal with increased power, and correspondingly reduce the transmission power requirement of the transceiver device and reduce the microwave driving power threshold of the communication circuit.

The invention provides a miniature electric field sensor and electronic equipment, and relates to the technical field of sensors. The miniature electric field sensor provided by the invention comprises a substrate; the first optical waveguide is arranged on the substrate, the first optical waveguide is provided with an optical input end and an optical output end, and the optical input end and the optical output end are used for being connected with a laser source and an optical detector respectively; and the second optical waveguide is in optical path connection with the first optical waveguide and is located on one side of the first optical waveguide, and the second optical waveguide is of an annular structure. The miniature electric field sensor is small in size, high in integration degree, high in measurement sensitivity and high in temperature and humidity stability.

The invention provides a power divider, which comprises a ceramic substrate, a magnetic core, an impedance capacitor and an isolation resistor, and is characterized in that an input end electrode, a first output end electrode, a second output end electrode and a grounding end electrode are arranged on the outer surface of the ceramic substrate; the magnetic core is arranged on the outer surface of one side of the ceramic base body in the thickness direction, the magnetic core is in a square ring shape, a power distribution winding is wound on the magnetic core, and the power distribution winding is configured to distribute an input signal of the input end electrode to the first output end electrode and the second output end electrode; the impedance capacitor is arranged on the outer surface of the ceramic substrate, one end of the impedance capacitor is connected with the input end electrode, and the other end is connected with the grounding end electrode; the isolation resistor is arranged on the outer surface of the ceramic substrate, and the isolation resistor is connected between the first output end electrode and the second output end electrode. The power divider can achieve the purposes of small size, wide frequency band and high reliability.

The invention discloses an underwater operation device based on bionic motion design, and relates to the field of underwater operation devices.The underwater operation device comprises a device body and a plurality of sets of bionic flapping wings which are arranged in the circumferential direction of the device body and rotationally connected to the device body; each group of bionic flapping wings comprises two bionic flapping wings which are the same in structure and are symmetrically arranged on the two radial sides of the device body, and the main control module controls the two bionic flapping wings in the propelling wing group to flap symmetrically through the flapping wing control assembly so as to realize propelling control; the main control module controls the two bionic flapping wings in the control wing group to flap asymmetrically through the flapping wing control assembly so as to control and adjust the course, and efficient propelling and rapid maneuvering of the underwater operation device can be achieved by controlling flapping movement of the bionic flapping wings. Compared with a traditional underwater operation device, the underwater operation device has the advantages of being low in noise, high in endurance, high in navigation efficiency and the like, and the task carrying requirement of the underwater operation device is met.

The invention discloses a touchpad with a broadband vibration function and touch equipment, the touchpad comprises a base and a touch panel, the touch panel is connected with the base and can move relative to the base, the touch panel is connected with a frequency expanding device, and the frequency expanding device is connected with the base. The frequency expanding device is arranged to be capable of vibrating relative to the touch panel when the touch panel vibrates due to driving force, and the vibration is transmitted to the touch panel so as to influence the vibration frequency of the touch panel. According to the scheme, the frequency expanding device is arranged to vibrate relative to the touch panel, namely, the vibration freedom degree is increased for the touch panel, the vibration frequency of the touch panel can be expanded on the basis of the vibration frequency formed by an original power source, and therefore vibration feedback in a wider frequency range is achieved; the vibration feedback vibration frequency range can effectively cover the touch perception frequency range, so that a vivid physical mechanical key simulation object feeling vibration feedback effect can be realized.

A calibration device and method for a wide-band resistor voltage divider angle difference, comprising: a wide-band power acquisition and analysis system, comprising: a main control computer, a PXI controller and a digitizer; the PXI controller is respectively connected to the main control computer and the digitizer; the wide-band power acquisition and analysis system is used to perform high-speed synchronous sampling of the analog small signal passing through the voltage divider, and then transmit the data to the main control computer, and the signal is analyzed and processed by the compiled upper computer program; an electric power standard source is respectively connected to the main control computer, the voltage divider and the digitizer; the electric power standard source uses high-order harmonics to simulate the wide-band signal output to apply a working voltage to the voltage divider; the voltage divider is respectively connected to the electric power standard source and the digitizer as a device to be tested. The present invention adopts high-order harmonic simulation technology to generate a wide-band signal input to achieve accurate calibration of the voltage divider angle difference at different frequencies.

A full-range diaphragm with a three-fold loop and dual voice coils includes a diaphragm body and an inner voice coil, an outer voice coil, an inner support frame, and an outer support frame disposed on the inner side of the diaphragm body. The inner support frame, inner voice coil, outer voice coil, and outer support frame are arranged sequentially from the inside to the outside on the inner side of the diaphragm body. The diaphragm body includes an inner loop, a middle loop, and an outer loop arranged sequentially from the inside to the outside, with the cross-sectional dimensions of the inner loop, middle loop, and outer loop increasing sequentially. This invention, by setting a three-fold loop structure from the inside to the outside, and with the height of the three loops gradually increasing from the inside to the outside, combined with the support stiffness of the inner and outer sides of the diaphragm body, enables the three loops to not only achieve precise frequency band coverage when vibrating independently, but also to achieve full-range coordination during vibration. It has strong practicality and significant potential for widespread application.

The invention relates to a self-resetting two-way colloid damper and an assembling method thereof, and belongs to the technical field of vibration control, the self-resetting two-way colloid damper comprises a piston connecting rod, a guide cylinder, an upper pressing plate, a cylinder body, a piston rod, an upper piston, a lower piston, a lower pressing plate, a piston rod limiting nut, a tail cylinder, a compression spring and working liquid with a porous lyophobic matrix, and the cylinder body is filled with the working liquid. The guide cylinder and the tail cylinder are respectively arranged at two ends of the cylinder body to form a cylinder body of the damper; an upper pressing plate is arranged on the side, close to the guide cylinder, in the cylinder of the damper, and a lower pressing plate is arranged on the side, close to the tail cylinder, in the cylinder of the damper. An upper piston and a lower piston are oppositely arranged on the inner side of the upper pressing plate and the inner side of the lower pressing plate correspondingly. A working liquid with a porous lyophobic matrix is filled between the upper piston and the lower piston; and the compression spring is sleeved on the piston rod between the upper piston and the lower piston. According to the invention, the problem of vibration control under normal use of constructional engineering and other dynamic systems can be solved, and the design of constructional engineering based on functionality and safety is realized.

The invention discloses a frequency divider frequency division ratio change automatic detection circuit which is used for being connected with a frequency divider and detecting the change value of the frequency division ratio of the frequency divider in real time. The detection circuit comprises a frequency dividing circuit, a phase inverter, a DFF trigger, an exclusive-OR gate operational circuit and a NOR operational circuit; the phase inverter is linked with each frequency dividing ratio Bit port of the frequency divider, outputs a corresponding node signal and inputs the corresponding node signal to the DFF trigger; the frequency dividing circuit is connected with an output port of the frequency divider and is used for carrying out frequency division on a clock subjected to frequency division by the frequency divider again, inputting an obtained clock signal to each DFF trigger to serve as a sampling clock, inputting an output signal of the DFF triggers, each Bit signal and each node signal to a corresponding exclusive-OR gate operational circuit together and then passing through the NOR operational circuit to obtain an output signal; the frequency divider is used as a reset signal or other identification signal or logic control signal of the counter to control the frequency divider, so that the correct clock frequency can be output in time after the frequency divider changes the frequency dividing ratio.

The invention discloses a strong sound player, including: a bottom dish shell, an upper dish shell, an upper sound cone, a sound head, a power amplifier unit, a lower sound throat, a lower sound cone, an intelligent playback control unit, a GPS antenna, a remote control antenna, and an audio socket; the bottom dish shell and the upper dish shell are arc-surface shells made of lightweight and high-rigidity materials, the sound head and the power amplifier unit are installed in the upper dish shell, and the sound waves generated by the sound head are emitted from the sound-emitting gap between the lower sound throat and the lower sound cone, and radiate outward through the gap between the upper dish shell and the bottom dish shell; the sound signal output by the intelligent playback control unit is connected to the power amplifier unit, and the power amplifier unit amplifies the sound signal and outputs it to the sound head to emit sound; the gap between the upper dish shell and the bottom dish shell forms an exponential speaker with a winding coefficient close to 15 and an area ratio close to 150 times, and has a wide-band low-detuning isotropic radiation characteristic. The invention has the advantages of wide frequency range, low full-scale distortion, isotropic sound radiation, a maximum output sound source level of 174dB@1m, and integrated integration.

The invention belongs to the field of electronic technology and discloses a hybrid frequency synthesizer based on orthogonal modulation, comprising: an integrated phase-locked loop, a loop filter, a voltage-controlled oscillator, a power divider, an orthogonal modulator, a standard frequency generator, two direct digital frequency synthesizers, a radio frequency amplifier, a filter, and a controller. The hybrid frequency synthesizer is applied to a local oscillator or radio frequency excitation signal of an ultrashort wave superheterodyne communication device, has a wide frequency coverage range, low noise and spurious, short frequency switching time, and excellent noise and spurious performance.

The invention relates to the technical field of communication, and provides an antenna. The antenna comprises a reflecting plate, a phase shifter, a combiner and a radiation unit, and the phase shifter is arranged below the reflecting plate and comprises a phase shifter cavity and a phase shifting circuit arranged in the phase shifter cavity; the combiner is arranged above the reflecting plate and comprises a combiner cavity and a combining circuit arranged in the combiner cavity; the radiating unit is arranged above the reflecting plate, the phase shift circuit is connected with the combining circuit, and the combining circuit is connected with the radiating unit. By means of the arrangement, the phase shifter and the combiner are arranged separately and located on the upper side and the lower side of the reflecting plate respectively, so that the combiner and the phase shifter can be debugged and installed independently, the phase debugging difficulty is effectively reduced, the width of the cavity of the phase shifter is not limited any more, and the frequency band range application range is wider; the combiner comprises a combiner cavity and a combining circuit arranged in the combiner cavity, so that the loss of the combiner is smaller; therefore, the loss is reduced while the phase is conveniently and independently debugged.

An on-chip transformer includes a primary coil and a secondary coil, each of which includes multiple metal layers; all metal layers are stacked in the height direction of the primary coil and the secondary coil; each metal layer includes a plurality of independent metal rings with the same structure; the metal rings are configured as a spiral structure diffused from the inside to the outside; the top metal layer in the primary coil is provided with N input terminals; the top metal layer in the secondary coil has (N+1) output terminals, where N is an integer; the signal enters through the input terminal and then outputs from the output terminal. The present invention also proposes a manufacturing process for preparing the above-mentioned on-chip transformer. The present invention has a large coupling area and a small occupied area, and is also suitable for half-bridge or full-bridge DC-DC converters, and can achieve output of any proportion by adjusting the voltage by boosting, bucking or equalizing, balancing the resistance and reducing the parasitic effects in the coil.

The invention discloses a noise reduction structure, a compressor and refrigeration equipment. The noise reduction structure comprises a bottom plate, a plurality of first surrounding cavity structures and a plurality of second surrounding cavity structures. The multiple first enclosure cavity structures are distributed on the surface, facing the sound source, of the bottom plate at intervals, a first airtight cavity is formed between the first enclosure cavity structures and the bottom plate, and at least one wall face, forming the first airtight cavity, of the first enclosure cavity structures is a first vibration wall; at least two spaced second enclosed cavity structures are arranged in the first airtight cavity, the second enclosed cavity structures are connected with the bottom plate to form a second airtight cavity, and at least one wall surface, forming the second airtight cavity, of the second enclosed cavity structures is a second vibration wall. According to the technical scheme, the dual sound absorption and insulation effects are achieved, the frequency range capable of absorbing noise is widened, when the noise reduction structure is applied to the compressor, noise in the range from low frequency to intermediate frequency of the compressor can be effectively reduced, and the better noise reduction and sound insulation effects are achieved.

The embodiment of the invention discloses a direction finding antenna, and relates to the technical field of radio monitoring direction finding, a PCB dielectric substrate is adopted to carry antenna units, the antenna is combined in an upper and lower layered mode through a step-shaped structure of the antenna, the miniaturization design of the antenna is achieved, the first antenna unit and the second antenna unit which are arranged on the upper and lower layers respectively cover different frequency bands, and the antenna performance is improved. The antenna unit is arranged on the PCB dielectric substrate to ensure the expansion of the working coverage frequency band of the antenna, the dielectric substrates are arranged in a crossed manner, the stability of the dielectric substrates is realized on the premise of ensuring the relative position relation of the antenna and the feed transmission lines, and the feed transmission lines corresponding to the antenna units are arranged on the PCB dielectric substrate to ensure the stability of the relative position relation of the antenna and the feed transmission lines. The influence of the antenna itself and the feed transmission line on the performance of other antennas can be reduced, so that the stability of the antenna performance is ensured, and the miniaturization design and the antenna performance of the direction-finding antenna are both considered.

The present invention belongs to the technical field of electroacoustic conversion. The present invention provides a speaker module for a mobile terminal provided with a sound outlet. The speaker module includes a speaker box, the speaker box includes a sound output opening for side sound emission, the speaker module also includes a horn connected to the sound output opening, the horn is a hollow structure, the sound output opening includes a first sound output opening arranged in the horizontal axis direction of the speaker box and a second sound output opening arranged in the longitudinal axis direction of the speaker box, the horn includes a first section connected to the first sound output opening, a second section bent and extended from one end of the first section away from the first sound output opening, and a third section, the end of the second section away from the first section is used to connect to the sound outlet; the two ends of the third section are respectively connected to the second sound output opening and the second section. Compared with the related art, the present invention can achieve multi-stage resonance, small volume, easy to widen the frequency band range and easy to adapt to mobile terminals.

The application discloses a construction of a magneto-optical photonic crystal waveguide and a nontrivial one-way bulk state robust transmission method. The waveguide can excite a reverse-handed one-way boundary state and a one-way bulk state with reverse transmission simultaneously by parameter design of a square magneto-optical photonic crystal waveguide. The reverse-handed one-way boundary state is absorbed by upper and lower boundary conditions with scattering boundary conditions. Under the strong light transmission restriction of the square magneto-optical photonic crystal, the one-way bulk state is limited in the strip to transmit in one direction, thereby avoiding being absorbed, so that the waveguide forms a nontrivial one-way bulk state. The structure is topologically protected, and the nontrivial one-way bulk state robust transmission with complete one-way conductivity of the waveguide channel is realized. Further, the controllability of the nontrivial one-way bulk state transmission frequency can be realized by adjusting the magnetic field strength. The application has wide application prospects in the fields of robust energy transmission, optical communication technology and integrated photonic circuit.

The present invention proposes a high-performance phase-locked digital frequency synthesis device, comprising: the output end of a crystal oscillator circuit is connected to the input end of a DDS device, the output end of a DSP device is connected to the input end of the DDS device, the output end of the crystal oscillator circuit is connected to the input end of a mixer, the output end of the mixer is connected to the input end of a bandpass filter, the output end of the bandpass filter is connected to the input end of a phase detector, the output end of the phase detector is connected to the input end of a low-pass filter device, the output end of the low-pass filter device is connected to the input end of an amplifier, the output end of the amplifier is connected to the input end of a voltage-controlled oscillator, the output end of the voltage-controlled oscillator is connected to the input end of a dual-mode pre-frequency divider, the output end of the dual-mode pre-frequency divider is connected to the input end of an N-frequency divider, and the output end of the N-frequency divider is connected to the input end of the phase detector.

The present application relates to a method, device and calculation system for calculating dynamic torque in sinusoidal torque calibration. Based on the implementation scheme of the present application, in the dynamic torque calibration, the calculation of dynamic torque takes into account the actual distribution of the angular acceleration of the load, and the dynamic torque value is more accurate. By tracing the dynamic torque quantity to the International System of Units (SI) through the moment of inertia and angular acceleration, a dynamic torque primary standard can be established. Using the method of the present invention, the frequency range of calibrating sinusoidal torque is wider and the measurement uncertainty is smaller, wherein the amplitude expansion uncertainty is better than 0.5%, and the phase shift expansion uncertainty is better than 0.5°; the amplitude expansion uncertainty of calibrating impact torque is better than 0.5%.

The utility model belongs to electroacoustic transducer technical field discloses a moving coil type sound head and microphone. The moving coil type sound head includes shell, first sound pickup subassembly and second sound pickup subassembly, the inside of shell has acoustic cavity, shell has the sound inlet, acoustic cavity is connected with outside through sound inlet, first sound pickup subassembly includes first magnet and first sound film, is provided with first coil on first sound film, first sound film is opposite sound inlet and is arranged in acoustic cavity, first magnet is arranged in acoustic cavity, first sound film vibration drives first coil to move relatively first magnet and produces electric current, second sound pickup subassembly includes second magnet and second sound film, second magnet is arranged in acoustic cavity, second sound film and first sound film are along the propagation direction of sound wave in acoustic cavity and are spaced, are provided with second coil on second sound film, second sound film vibration drives second coil to move relatively first magnet and produces electric current. The moving coil type sound head improves the sensitivity of sound signal acquisition, can better capture and restore sound signal.

This utility model belongs to the field of smart ring technology, and relates to a small-sized haptic feedback device for rings. It includes a touch module, which is bonded to an FPC board inside the ring and fixed by a transparent encapsulant. The touch module includes a housing and a vibration component disposed within the housing. The vibration component includes piezoelectric ceramic and a protrusion. One end of the protrusion is bonded to an upper metal sheet on the piezoelectric ceramic, and the other end extends to the outside of the housing. The protrusion can move up and down under the action of the piezoelectric ceramic, transmitting the vibration of the vibration component to the skin of the finger. This utility model proposes a small-sized, low-power, high-precision haptic feedback solution suitable for smart rings, achieving efficient haptic feedback within a limited space while also considering wearing comfort and battery life.

The invention discloses a suspended wire pendulum accelerometer, comprising a circuit component, an eddy current sensor component, a suspended wire pendulum component, an eddy current sheet, and a permanent magnet component. The eddy current sensor component comprises an eddy current coil, the suspended wire pendulum component comprises a pendulum frame, an elastically supported suspended wire, a coil winding is wound on the pendulum frame, one side of the pendulum frame is located in a fixed magnetic field, and the eddy current sheet is fixed on the pendulum frame and adapted to the eddy current sensor component. After power is applied, a high-frequency current is generated in the eddy current coil, an eddy current is formed on the surface of the eddy current sheet, and the coil winding is subjected to the magnetic force in the fixed magnetic field. The suspended wire pendulum component is suspended in balance. When subjected to acceleration, the suspended wire pendulum component generates an inertial moment deviating from a balanced position, and the eddy current sheet is displaced relative to the eddy current sensor component, causing the eddy current coil differential inductance to change and be converted into an electrical signal. The eddy current sheet is always in a balanced position through current feedback of a torque balance electrical signal loop, and the feedback current signal is simultaneously used as an output, that is, the magnitude of the acceleration is characterized.

A water-filled spherical shell sonar clock device in water comprises: an elastic spherical shell made of stainless steel, with at least one water injection hole and at least one air outlet hole on the surface; and a water injection device for injecting a preset amount of water into the elastic spherical shell through the water injection hole. The present invention utilizes the unique intermediate frequency matching resonance characteristics of the elastic spherical shell in water, regulates the intermediate frequency matching resonance characteristics by adjusting the thickness of the spherical shell, the water filling degree and the internal horizontal plank structure, constructs a classification and recognition model in combination with a BP neural network, establishes a mapping relationship between the sonar clock structure and its echo sound identification, and realizes passive sound identification based on the spherical shell sonar clock device, and has a small size, strong echo, a wide range of applicable frequency bands, no need to carry external energy, and has the advantages of good durability and strong concealment. It is suitable for marking surface and underwater navigation targets, position marking and tracking of underwater sunken ships, oil and gas pipelines and other structures, as well as underwater navigation and positioning of underwater vehicles and surface ships.

The utility model discloses a radio frequency self -checking device for FDD microwave communication system, including coupling circuit, frequency conversion circuit, frequency source circuit and controller, the coupling circuit is equipped with a two -way radio frequency port for with the two -way connection of external duplexer's tuning terminal, the through output port of coupling circuit is connected with the radio frequency input port of frequency conversion circuit, the intermediate frequency output port of frequency conversion circuit is connected with the coupling input port of coupling circuit, the local oscillator port of frequency conversion circuit is connected with the output port of frequency source circuit, it belongs to communication field, through this self -checking device, the signal of transmitting channel in system is frequency conversion to the signal of receiving channel, and sends back receiving channel and carries out the signal processing effect.

The application provides an IGBT module electrical parameter on-line measuring device and method, the device comprises an interrupt control unit, a micro control unit and an analog-digital conversion unit, the micro control unit comprises a micro processing unit and a first timing unit, the application does not use FPGA, greatly reduces the hardware cost, reduces the power consumption and the circuit board area of on-line measuring device, and is convenient for integration.The application realizes the high-speed sampling of electrical parameters in the transient process of IGBT module turn-on or turn-off based on a first interrupt signal, realizes the low-speed sampling of electrical parameters in the steady state process of IGBT module turn-on or turn-off through a second interrupt signal, simultaneously realizes the high-speed and low-speed sampling of IGBT module turn-on or turn-off, the frequency range of sampling pulse is wide, and the data amount of electrical parameter sampling is greatly reduced, which provides a data basis for the fault diagnosis of power electronic equipment device level, on-line estimation of junction temperature and aging health index monitoring.

The invention relates to the technical field of sound heads, and provides a moving-coil sound head and a moving-coil microphone applying the same, the moving-coil sound head comprises a front acoustic cavity, a moving-coil sound head sound-emitting body and a connecting device, the inner wall of the front acoustic cavity is provided with a first step and a second step which are in a circular truncated cone shape, and the first step is provided with a first opening; a second opening on the same side as the first opening is formed in the second step; the moving-coil voice head sounding body comprises a moving-coil voice head intermediate and a rear acoustic cavity, a piezoelectric ceramic piece is installed at the top of the moving-coil voice head intermediate, a connecting PCB is arranged at the bottom of the moving-coil voice head intermediate, the piezoelectric ceramic piece is matched with the first step, and the top of the moving-coil voice head intermediate is matched with the second step; the connecting device is laid close to the outer surface of the moving coil voice head intermediate, one end is connected with the PCB, the other end is connected with the piezoelectric ceramic piece, and the connecting device located on the outer surface of the piezoelectric ceramic piece is matched with the first opening and the second opening. According to the utility model, the frequency response range is wider, the sound is clearer and finer, the structure is simple, convenience and practicability are realized, and the sound quality effect is better.

The utility model discloses a signal generation card for a function test of a board to be tested, which comprises two groups of waveform generation modules, a group of digital-to-analog conversion modules and two groups of filtering operational amplifier systems, and the input end of each group of waveform generation module is controlled by SPI communication. The output end of each waveform generation module is connected with the input end of a filtering operational amplifier system, and the output end of the filtering operational amplifier system is connected with a detection output end. The output end of the digital-to-analog conversion module is respectively connected with the output end of each group of filtering operational amplifier system; according to the utility model, the I2C and SPI communication protocols are adopted, the flexible communication and switching of the low-frequency and radio-frequency modules are realized, the requirements of generating low-frequency and radio-frequency signals are met, the frequency range is wide, the stability is high, the communication protocol bus performance is strong, the density is high, and the signal synthesis and processing efficiency is improved, so that the design is greatly simplified, the equipment volume is small, and the cost is low. Layout is centralized, unified control is achieved, and resources are saved.

The present invention provides a speaker module for a mobile terminal provided with a sound outlet, the speaker module comprising a speaker box, the speaker box comprising a first sound output opening and a second sound output opening, the speaker module further comprising a first horn and a second horn; one end of the first horn is connected to the side of the speaker box and communicates with the first sound output opening, the other end of the first horn is used to connect to the sound outlet of the mobile terminal; one end of the second horn is connected to the side of the speaker box and communicates with the second sound output opening, the other end of the second horn is used to connect to the sound outlet of the mobile terminal; the first horn and the second horn are asymmetrically arranged with respect to the speaker box. The speaker module in the present invention realizes multi-order coupling of resonance peaks, which not only improves high-frequency performance, but also broadens the frequency band range, and at the same time, reduces manufacturing costs.

The utility model discloses a linear sound source waveguide horn, which comprises a shell. The top of the housing is provided with a sound source outlet whose diameter is gradually enlarged. An inner cavity of the shell is divided into a first half-cone cavity and a second half-cone cavity in different directions; a first unit mounting opening is formed in the end, with the gradually-reduced diameter, of the first half-cone cavity; a second unit mounting opening is formed in one end, with the gradually-reduced diameter, of the second half-cone cavity; the first unit mounting port and the second unit mounting port are respectively provided with a high-frequency sound production unit or an intermediate-frequency sound production unit; the time when a sound source is emitted from the intermediate frequency sound emitting unit or the high frequency sound emitting unit and then passes through the first half cone cavity to reach the sound source outlet is the same as the time when the sound source is emitted from the intermediate frequency sound emitting unit or the high frequency sound emitting unit and then passes through the second half cone cavity to reach the sound source outlet; according to the utility model, two compression driving units with different frequency response characteristics can be installed at the same time, and frequency response with a wider frequency response range can be obtained near an outlet of a line sound source horn.

The invention discloses a building sound insulation system and a construction method, the building sound insulation system comprises a suspender assembly, the suspender assembly is connected with a sound insulation supporting structure, and the sound insulation supporting structure is connected with a sound insulation structure; the sound insulation supporting structure comprises a first supporting structure, the first supporting structure is connected with a suspender assembly, the first supporting structure is connected with a first plate layer, and the first plate layer is provided with a plurality of porous sound absorption plates; the sound insulation supporting structure further comprises a second supporting structure, the second supporting structure is connected with the suspender assembly, the second supporting structure is connected with a second plate layer, and the second plate layer is provided with a plurality of sealing plates. And the sealing plate is positioned below the porous sound-absorbing plate. According to the description of the scheme, the scheme has the beneficial effects that the structure is simple, the design is reasonable, and the bass noise transmitted from the upper part can be effectively eliminated, so that the impact sound of upstairs floor slabs is isolated.